6 Best 230V Through-the-Wall Air Conditioners with Heat of 2026
We compared six 230V and 208/230V heat and cool wall units on cooling capacity, heating output, room size, plug type, noise and controls.
By Daniel Brooks
Updated October 19, 2026
If the outlet beside your wall sleeve is a 230 volt receptacle, you can choose from the strongest heat and cool wall units on the market. A 230V through-the-wall air conditioner with heat pairs 10,000 to 14,000 BTU of cooling with an electric heater of roughly 10,000 BTU or more, more than double what a standard outlet unit can offer. Our list of the best 230V through-the-wall air conditioners with heat compares six of them on cooling, heater size, room coverage, plug type, noise and sleeve fit. To browse every model we cover, visit our Through-the-Wall Air Conditioners with Heat page.
These units suit living rooms, large bedrooms, studio apartments and offices, and they are the usual replacement for the heat and cool wall units found in many apartment buildings.
All Products Compared
| Product | Best For | Cooling | Heating | Room Size | Noise |
|---|---|---|---|---|---|
| LG LT1237HNR 11,200 BTU Through the Wall Air Conditioner with Heat | Overall | 11,200 BTU | Supplemental heat | Up to 550 sq ft | 55 dB |
| Whirlpool 12,000 BTU Wall Air Conditioner with Heat | Universal sleeve fit | 12,000/11,600 BTU | 10600/8600 BTU | Up to 550 sq ft | 57 dB |
| TCL 14,000 BTU Smart Through-the-Wall Air Conditioner with Heater | Large rooms | 14,000 BTU | 13,600 BTU | Up to 700 sq ft | 57 dB |
| Keystone 10,000 BTU Wall Mounted AC with Heat | Medium rooms | 10,000 BTU | 10,600 BTU | Up to 450 sq ft | 58 dB |
| OLMO 14,000 BTU 230V Through-the-Wall AC & Heater | Quiet large rooms | 14,000/13,600 BTU/h | 10,600/8,600 BTU/h | Large rooms | 49.5 dB |
| ROVSUN 12000 BTU Through the Wall Air Conditioner with Heat | Value | 12000 BTU | 10600/8600 BTU | Up to 550 sq ft | 57 dB |
| Award | Product | WikiCooling Score About WikiCooling ScoreThe WikiCooling Score is our own rating from 0 to 10, based on the criteria described on our How We Review page. It reflects research, not laboratory measurement, and is never influenced by manufacturers, retailers, or affiliate commissions. Learn more › | |
|---|---|---|---|
| Best Premium |
LG LT1237HNR 11,200 BTU Through the Wall Air
|
7.3/10 | Buy |
| Best Value |
Whirlpool 12,000 BTU Wall Air Conditioner
|
7.8/10 | Buy |
TCL 14,000 BTU Smart Through-the-Wall Air
|
Buy | ||
| Best Budget |
Keystone 10,000 BTU Wall Mounted AC with Heat
|
7.0/10 | Buy |
OLMO 14,000 BTU 230V Through-the-Wall AC & Heater
|
6.8/10 | Buy | |
| Best Overall |
ROVSUN 12000 BTU Through the Wall Air Conditioner
|
8.3/10 | Buy |
LG LT1237HNR 11,200 BTU Through the Wall Air
Experience optimal cooling and heating with our versatile 11,800 BTU Through the wall Air Conditioner unit. Designed for medium-sized rooms up to 520 sq. ft., this unit offers two cooling/heating and fan speeds, allowing you to customize your comfort according to your needs. The 4-way air deflection feature empowers you to direct the airflow precisely, whether you are cooling, heating, dehumidifying, or simply circulating the air. Take advantage of the convenient 24-hour on/off timer and energy-saving option to reduce energy costs while maintaining a comfortable environment. In the event of a power outage, the auto restart feature ensures that your unit will automatically resume operation once power is restored, saving you from the hassle of manual adjustment. Our wall air conditioner comes with a user-friendly remote control, providing effortless control from anywhere in the room. The trim kit adds a touch of elegance to the installation, achieving a seamless and sophisticated finish. The removable and washable filter ensures clean and fresh airflow, while the check filter alert reminds you when it's time to clean or replace the filter for optimal performance. Please note that the wall sleeve required for installation is sold separately.
Whirlpool 12,000 BTU Wall Air Conditioner
This Whirlpool through-the-wall air conditioner delivers 12,000/11,600 BTU of cooling for rooms up to 550 square feet, plus supplemental heat for chilly evenings. It fits standard wall sleeves and includes a remote, programmable timer, and Eco mode. Best suited for homeowners seeking a permanent cooling solution with basic heating capability.
Pros
- Powerful cooling for large rooms
- Supplemental heat for mild cold
- Fits standard wall sleeves
- Remote control included
- Easy-clean washable filter
Cons
- Requires 230V/15A outlet
- SEER 9.6 is below modern standards
- Heavy at 72.3 pounds
TCL 14,000 BTU Smart Through-the-Wall Air
Take control over your home comfort. The TCL 14,000 BTU Smart Through-the-Wall Air Conditioner is equipped with a 13,600 BTU heater so you can set and maintain your ideal temperature in spaces up to 700 sq. ft. And with its included remote and the TCL Home mobile app, you can adjust its settings without having to get up from the comfort of your couch. You can also pair it with Alexa or Google Assistant-enabled devices to control it with simple voice commands. This wall unit helps keep your energy bill low with Sleep and Eco modes that prioritize energy efficiency, and it includes several fan speeds (low, medium, high, and auto in cool mode) along with 4-way ventilation and multidirectional louvers to ensure even and consistent cooling across your space. Its washable and reusable filter helps protect the life of your AC while also reducing large airborne particles like dust and pet hair. The unit comes with guided instructions so you don’t have to be an expert technician to set up your through-the-wall AC. Once set up, the LED display makes controlling your wall AC simple. It’s time to enjoy your home the way it was meant to be. Sleeve not included. Compatible sleeve dimensions: 26”x20”x15.57.
Keystone 10,000 BTU Wall Mounted AC with Heat
This through-the-wall unit delivers 10,000 BTU of cooling and 10,600 BTU of supplemental heat for rooms up to 450 sq ft, with a built-in dehumidifier that removes 2.3 pints per hour. It requires a 230V/20A outlet and a separate wall sleeve (not included), making installation more involved than a window unit. Suitable for small to medium spaces where a permanent solution is desired.
Pros
- Cools and heats for year-round comfort
- Built-in dehumidifier improves air quality
- Smart remote with LCD and 3-minute updates
- Energy Saver and Sleep modes cut costs
- Washable filter with maintenance alert
Cons
- Requires 230V outlet and separate wall sleeve
- Noise level of 58 dB
- Supplemental heat not for primary heating
OLMO 14,000 BTU 230V Through-the-Wall AC & Heater
Product description The Olmo TTW Through the Wall Unit Olmo’s “Through The Wall” air conditioning unit is a versatile and efficient cooling solution designed to seamlessly integrate into your living space. This unit combines convenience, efficiency, and comfort, all in one sleek package. Some of its great features include a remote control that allows you to change settings, adjust temperature, and switch modes from the comfort of your couch or bed. Whether you’re upgrading your home or office, Olmo has you covered, making this unit an excellent choice for any room. Olmo takes convenience to the next level with “Smart Connect” letting you control the unit remotely using your smartphone. The exclusive remote controller features include Sleep Mode, Timer, Auto Restart and a Self evaporating system. Olmo’s TTW Sleeve is available to purchase separately for easy installation. From the brand OLMO offers a range of air conditioning and heating solutions, such as ducted and ductless mini splits, Multi-positional Air Handlers, and Through The Wall systems. Known for affordability and quality, OLMO integrates cutting-edge technology to deliver reliable, energy-efficient, and user-friendly products. Our commitment to innovation ensures high SEER2 ratings, minimal noise, and effective performance, making OLMO a smart choice for any space. Through-The-Wall A/C Single Zones Multi Zones
ROVSUN 12000 BTU Through the Wall Air Conditioner
This 230V through-the-wall air conditioner delivers 12,000 BTU of cooling and up to 10,600 BTU of heating for rooms up to 550 square feet. It offers multiple modes including dehumidification and a 24-hour timer, with easy-clean filters and a remote control. Ideal for bedrooms, apartments, and small offices seeking year-round climate control.
Pros
- Cools and heats spaces up to 550 sq ft
- Multiple operating modes including dehumidification
- Easy-clean washable filter
- Remote control included
- Energy-saving ECO mode
Cons
- Noisy on medium and high fan settings
- Requires 230V outlet, not standard 115V
- Wall sleeve sold separately
Top 3 230V Through-the-Wall Air Conditioners with Heat Reviewed
#1 LG LT1237HNR 11,200 BTU Through the Wall Air Conditioner with Heat: Best Overall
Why We Picked It
The LG LT1237HNR is the most established 230 volt heat and cool wall unit we cover, with a 3.7 average from 75 ratings. LG rates it at 11,200 BTU for rooms up to 550 square feet and adds supplemental electric heat that uses the same 60 to 86 degree F thermostat range as cooling. That makes it a simple, all-season choice for a medium living room or the main room of an apartment.
LG lists 55 dB, which is lower than most units in this guide. You get two cooling, heating and fan speeds, 4-way air deflection, a 24 hour timer, auto restart, a filter reminder and a remote, and the 24 inch chassis fits LG’s family of sleeves. It requires a 230/208 volt LCDI plug of the NEMA 6-20 type, and LG lists a maximum of 3500 watts, reflecting the heater load.
Key Specifications
- Cooling Capacity: 11,200 BTU
- Room Size: Up to 550 sq ft
- Power: 230/208V, NEMA 6-20 plug
- Max Wattage: 3500 watts
- Noise Level: 55 dB
- Weight: 82 pounds
| Pros | Cons |
|---|---|
|
|
Things to Consider
The product description mentions 11,800 BTU and 520 square feet in places, while the specifications list 11,200 BTU and 550 square feet. Use the specification figures to size your room.
Best For
This unit is best for apartments with a NEMA 6-20 outlet at the sleeve, especially when replacing an older LG heat and cool unit.
Check the current price and availability of the LG LT1237HNR 11,200 BTU Through the Wall Air Conditioner with Heat on Amazon.
Read our full LG LT1237HNR 11,200 BTU Through the Wall Air Conditioner with Heat review.
#2 Whirlpool 12,000 BTU Wall Air Conditioner with Heat: Best Universal Fit
Why We Picked It
The Whirlpool WHAT122-HAW is the easiest 230 volt replacement unit, because its chassis fits sleeves from 24.5 to 27 inches wide. That range covers many older sleeves from other brands, so you can often swap units without changing the sleeve. It delivers 12,000/11,600 BTU of cooling and 10600/8600 BTU of supplemental heat for spaces up to 550 square feet, and has a 4.0 average from 10 ratings.
The controls are straightforward: 3 fan speeds, 4 operation modes, 8-way directional louvers, Eco and Sleep functions and a programmable 24 hour timer. Eco mode turns the compressor off once the room reaches the set temperature, and the unit removes up to 1.6 pints of moisture per hour. A trim kit and rear grille are included. It plugs into a 230V/15A outlet with an attached 4.9 foot cord.
Key Specifications
- Cooling Capacity: 12,000/11,600 BTU
- Heating Capacity: 10600/8600 BTU
- Room Size: Up to 550 sq ft
- Power: 230V/15A outlet
- Noise Level: 57 dB
- Weight: 72.3 pounds
| Pros | Cons |
|---|---|
|
|
Things to Consider
Whirlpool says the heat is not meant as a primary heat source in the coldest months. Check that the cord reaches your outlet without an extension.
Best For
This unit is best for replacing an older wall unit when you are not sure which brand of sleeve is in the wall.
Check the current price and availability of the Whirlpool 12,000 BTU Wall Air Conditioner with Heat on Amazon.
Read our full Whirlpool 12,000 BTU Wall Air Conditioner with Heat review.
#3 TCL 14,000 BTU Smart Through-the-Wall Air Conditioner with Heater: Best for Large Rooms
Why We Picked It
The TCL H14T9XH is the large-room pick, rated for spaces up to 700 square feet. Its 13,600 BTU heater is the strongest in this guide and nearly matches its 14,000 BTU cooling section, so it can carry an open living area or a studio apartment through cool days with real warmth.
It is also fully smart. The TCL Home app, Alexa and Google Assistant handle remote and voice control, and Dry, Sleep and Eco modes add flexibility. In cool mode, the fan runs at low, medium, high or auto, and 4-way ventilation with multidirectional louvers helps spread air across a big room. TCL lists 57 dB and a rated draw of 1460 watts in cooling. It has 23 ratings on its listing.
Key Specifications
- Cooling Capacity: 14,000 BTU
- Heating Capacity: 13,600 BTU
- Room Size: Up to 700 sq ft
- Power: 230 volts, 1460 watts
- Noise Level: 57 dB
- Smart Control: TCL Home app, Alexa, Google Assistant
| Pros | Cons |
|---|---|
|
|
Things to Consider
TCL lists a compatible sleeve of 26 by 20 by 15.57 inches. In rooms under about 550 square feet, a 12,000 BTU unit will control humidity better.
Best For
This unit is best for large living areas and studios that need both strong cooling and real heat.
Check the current price and availability of the TCL 14,000 BTU Smart Through-the-Wall Air Conditioner with Heater on Amazon.
Read our full TCL 14,000 BTU Smart Through-the-Wall Air Conditioner with Heater review.
Other Models Worth Considering
Keystone 10,000 BTU Wall Mounted AC with Heat (KSTAT10-2HD). A medium room unit for up to 450 square feet with a 10,600 BTU supplemental heater, more heat than cooling. Its remote reads the temperature where you sit, and Keystone adds 4 years of sealed system coverage on top of 1 year parts and labor. It needs a 230-volt/20-amp outlet and lists 58 dB.
OLMO 14,000 BTU 230V Through-the-Wall AC & Heater (OW-P14HS230WF). A large-room alternative with 14,000/13,600 BTU/h of cooling, 10,600/8,600 BTU/h of heat, a built-in smart kit and an unusually low listed 49.5 dB. It has only 8 ratings so far, averaging 3.4, so it is a newer and less proven choice.
ROVSUN 12000 BTU Through the Wall Air Conditioner with Heat. A value pick for up to 550 square feet with 12000 BTU of cooling, a 10600/8600 BTU heater, four modes, three fan speeds and a 24 hour timer. It fits a standard 25.5 inch sleeve, lists 57 dB and has a 4.3 average from 22 ratings shared across the series. There is no Wi-Fi.
What to Expect from 230V Through-the-Wall Air Conditioners with Heat
A 230 volt circuit carries enough power for a large heating element, so these units list heaters of about 10,600 BTU or more, well over double what standard outlet models offer. That is enough to warm a medium to large room properly on cool days. Most brands still describe the heat as supplemental, so in a cold climate it works best alongside a central system. Because the heater draws far more power than the compressor, running costs rise in heat mode.
For specific sizes, see our guides to 12,000 BTU through-the-wall air conditioners with heat and 10,000 BTU through-the-wall air conditioners with heat. The product cards show the current price for each unit.
How to Choose a 230V Through-the-Wall Air Conditioner with Heat
Size the Unit to the Room
ENERGY STAR publishes this general guide for sizing a room air conditioner by floor area:
| Room Size (sq ft) | Cooling Capacity (BTU/hr) |
|---|---|
| 100 to 150 | 5,000 |
| 150 to 250 | 6,000 |
| 250 to 300 | 7,000 |
| 300 to 350 | 8,000 |
| 350 to 400 | 9,000 |
| 400 to 450 | 10,000 |
| 450 to 550 | 12,000 |
| 550 to 700 | 14,000 |
| 700 to 1,000 | 18,000 |
Reduce capacity by 10 percent for a heavily shaded room, increase it by 10 percent for a very sunny room, add 600 BTU for each regular occupant beyond two, and add 4,000 BTU if the unit cools a kitchen. Source: ENERGY STAR.
Match the Plug and Amperage
230 volt receptacles come in different types. LG specifies a NEMA 6-20 plug, Keystone and the Whirlpool 10,000 BTU call for a 20 amp outlet, and the Whirlpool 12,000 BTU calls for a 15 amp outlet. Check the receptacle beside your sleeve and match the plug exactly. Never use an adapter.
Understand 230V and 208V Ratings
Many units list two figures, such as 12,000/11,600 BTU or 10600/8600 BTU. The first is the output on a 230 volt supply and the second on a 208 volt supply, which is common in apartment buildings. If your building runs at 208 volts, plan around the lower numbers.
Match the Sleeve
LG, Keystone, OLMO and Whirlpool use a chassis about 24 inches wide, with Whirlpool fitting sleeves from 24.5 to 27 inches. ROVSUN fits a 25.5 inch sleeve, and TCL specifies 26 by 20 by 15.57 inches. Measure before you order.
How We Evaluate 230V Through-the-Wall Air Conditioners with Heat
We rank heat and cool wall units on manufacturer specifications, listing details and aggregated buyer ratings. For this list we kept only through-the-wall chassis with a heat mode that run on a 230 or 208/230 volt circuit, and excluded cooling-only units, window units and standard outlet models. We weighed cooling, heating output, room size and buyer feedback first, giving more weight to ratings from larger numbers of buyers, then compared noise, plug type, sleeve fit, controls and warranty.
Frequently Asked Questions
Which 230V wall unit has the strongest heater?
The TCL 14,000 BTU unit, with a 13,600 BTU heater.
Which one fits the widest range of sleeves?
The Whirlpool 12,000 BTU unit fits sleeves from 24.5 to 27 inches wide.
Which one is the quietest?
The OLMO 14,000 BTU unit lists 49.5 dB, and the LG LT1237HNR lists 55 dB.
Will a 230V unit work on 208 volts?
The units here are rated for 208/230 volt supplies, with somewhat lower cooling and heating output on 208 volts.
Final Verdict
The LG LT1237HNR 11,200 BTU Through the Wall Air Conditioner with Heat is the best 230V through-the-wall air conditioner with heat for most apartments, with the longest track record and a 55 dB listing. For the easiest replacement in an unknown sleeve, choose the Whirlpool 12,000 BTU Wall Air Conditioner with Heat. For large rooms, the TCL 14,000 BTU Smart Through-the-Wall Air Conditioner with Heater brings the strongest heater and full smart control.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.